Machine for bending sheet metal



(No Model.) 2 Sheets-Sheet 1.

P. KIMMEL.

MACHINE POR BENDING SHEETV METAL.

Patented July '12, 1887'.

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H 1. w. am 2 T TM F h U 2 Sheets-Sheet 2.

Ilatented Jul P. RIMMEL.

MAGEINE EOE BENEING SEEET METAL.

(No Model.)

NITED STATES f PATENT Grrrcn.

PHILIP KIMMEL, OF ALTOONA, PENNSYLVANIA.

MACHINE FOR BENDING SHEET METAL.

SPECIFICATION forming pari'. of Letters Patent No. 366,486, dated July 12, 1887.

Application filed March 7, 1887. Serial No. 230,004. (No model.) i

To all whom, t may concern,.-

Be it known that I, PHILIP KIMMEL, a eitizen of the United States of America, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented a new and useful Machine for Forming Square Pipe and Boxes, of which the following is a specifica tion.

My invention has relation to improvements in machines for' making angular vessels or pipes from sheet metal; and the object is to improve the construction of existing mechanism of the art.

My invention consists in the novel construction of parts and their combination, as hereinafter will be fully specied, and specially as pointed out in the claims made hereto.

I have fully illustrated my improvements in the accompanying drawings, forming a part of this specification, wherein- Figure l is a front View of the machine in elevation. Fig. 2 is a side view in elevation. Fig. 3 is top plan view. Fig. 4 isa transverse section through the bed-plate. VFig. 5 is a front view of the clamping-,bar detached, and Fig. 6 is a front view of the formera In the drawings like notations denote similar elements or parts, and reference being thereto had, the letter Adesignates the frame which supports the platen or bed-plate and the forming mechanism. This frame consists of two substantial side pieces, 1 2, made of cast metal, and of duplicate construction. On the tops of the side pieces is secured the platen or bed-plate 3 by screws or bolts 4, having their heads count-ersunk in the bedplate, substantially as shown. In the bedplate are formed slots 5, arranged longitudinally, as seen, and in order that the bed-plate shall not be weakened by these openings the parts separated are connected below by a ridgepiece, a, having a chamber into which the slots open, the chamber forming with the slots a T-shaped receptacle, into which the head and neck ofthe set-screws of the gage-bar are inserted. The T-slots open at the front end of the plate. On the edge of each slot and arranged to register with each other is a graduated measurement, b, whereby the gagebar may be set as desired. Transversely arranged on the bed-plate is the gage-bar 7, heldv in position by set-screws S, projected through it, the heads of which are seated, as stated, in the T-slots of the beds. By means of these screws the gage-bar may be set tight in any position on the plate desired. This gage-bar has on one end a series oftransverseserrations or grooves, a2, to receive seams or other lines in the metal of the pipe or box.

The letters B designate brackets secured to each side piece, which are designed to hold and direct the clamping-bar, the treadle-rods,

and the coil-springs. These brackets are duplicate in form, and are composed of a horizontal arm, 9, projected rearward, and havingbolt-holes,with bolts to secureit to the side pieces of the frame, a vertically-depending arm, 10, having side extensions, 11 12, with passages 13, to receive the treadle-rods of the clamping-bar, and the upper extension, 14, formed with open-end slot 15, to take and guide the ends of the clamping-bar. The lower part, 10, preferably stands slightly outward from the frame, substantially as seen in Fig- 1 of the drawings.

The letter C designates the clamping-bar. This consists ot' a substantial metal bar having its ends 16 formed to project through and fit in the open-end slots of the brackets B. The projecting ends of the clamping-bar are formed wit-h holes, through which bolts are passed, and to these are pivotally attached and suspended the treadle-rods 17, which are passed through the side extensions of the brackets, and have secured thereon between the side extensions an adjustable sleeve, 1S, or other proper seat, and a coilspring, 19, one end ot' which sets on the lower side extension of the bracket, with the upper end set against the sleeve, as shown, the function being to lift the clamping-bar when drawn down on the metal sheet or bed-plate. The lower front portions of the side pieces of the frame are vertically slotted, as at 20, and in these slots is disposed a bar, 21, to the outer ends ol' which are attached the lower ends of the treadle-rods. This bar 21 is secured to the treadle 22, which is fulcrumed to the back part of the frame, as'at 23. The clamping-bar is thus drawn down by the downward motion of the treadle, and then returned or lifted when the power is removed. by the force of the coil-springs.

The letter D designates the former. This consists ofa heavy metal bar substantially of IOO the form seen in Fig. 6 of the drawings. The ends are countersunk and fitted to pivot on the pivot-screws 25,'let through the brackets in the Trame, fastening-nuts 26 being Von the stem of the pivot-screws to secure them. In one edge of the former are two or more screw-pits, in which handles 27 are screwed, by which the former is tilted and brought up to turn the projecting sheet of metal up against the face of the clamping-bar. The former is pivoted so that its upper inner corner turns on the line of the bed-plate, and so that by a quarter-turn the i upper face will stand erect and. turn the metal sheet at right angles to the part on the bedplate. rlhis former has on one end aseries of p transverse serrations or grooves a on a line with and to correspond with those on the gagebar.

The operation may be stated as follows: The size ofthe box or piping having been determined by ad j ustmcnt oi'- the gage-bar,a sheetof metal is laid on the bed-plate with the part to be bent up extending under the clamping-bar and over the'former. Now, by pressing down the treadle the ciamping-baris drawn down and clamps thesheet, and then byturningthe former up and against the face of the clalnpingbar the sheet is turned up and the angle formed. A

repetition of this action applied to other 1neasurements of the sheet forms the box or pipe. l

Vhat I claim as my inventionfand desire to` secure by Letters Patent, is-

l. The combination, with the frame and the bedplate secured thereon, of the side brackets having ahorizontal arm, 9, extended rearward to secure the bracket to the frame, a verticallydepending arm, 10, having side extensions, 1l 12, with passages, and the vertical extension 14 with open-end slot, the clamping-bar arranged in said slots of the sidel brackets, treadle-rods connected to said clamping-bar and passed through the side extensions of the side brackets,'and provided with coil-springs seated in thesaid side extensions,andatreadlefulcrulned in the base of the machine, substantially as described, and for the purpose specified.

' 2. The combination, with the frame and the bed-plate secured thereon, said frame being provided with vertically-arranged slots 20 in thelower front part, of the side brackets formed with a horizontal arm, 9, to secure them to the frame, a vertically-depending arm, 10, having side extensions, 11 12, with passages, and the vertical extension 14 with open-end slots, the clamping-bar arranged in said slots of the side brackets, a treadle fulcru med to the side pieces of the frame and provided with `a cross-bar arranged with its ends projecting through the slots in base of the frame, and treadle-rods connected to the ends ofthe clamping-bar andthe cross-bar of the treadie, and provided with springs seated in the side brackets to lift the clamping-bar, substantially asdescribed.

' 3; The combination, with the frame and the bed-plate secured thereon, said frame being provided with vertically-arranged slots 2O in y the lower front part, of theside brackets formed with a horizontal arm, 9, to secure them to the vframe, a vertically-depending arm,`10, having side extensions, 11 12, with passages, and the vertical extension LL with openend slots, the

clamping-bar arranged in said slots of the side brackets, a treadle fulcrumed to the side pieces ofthe frame and provided with a cross-bar arranged withitsendsprojecting through theslots in the base of the frame, treadle-rods connected to the ends of the clamping-bar andthe crossbar of the treadle and provided with springs seated in the side brackets to lift the clamping bar, and the former hung on pivots projected through the side brackets, substantially as dcscribed.

In witness whereof I have hereunto set my hand in the presence of two attesting wit- Vmesses.

.PHILIP RIMMEL.

Attesti J. D. I-Irorrs,

W. D. COUCH. 

